EXAFS and XANES studies of silica-titania sol-gel films

被引：20

作者：

Almeida, RM ^{[1
]}

Marques, MID ^{[1
]}

Orignac, X ^{[1
]}

机构：

[1] UNIV LISBON,CTR FIS MAT CONDENSADA,P-1699 LISBON,PORTUGAL

来源：

JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY | 1997年 / 8卷 / 1-3期

关键词：

SiO2-TiO2; films; EXAFS; XANES; synchrotron radiation; four-fold coordinated Ti; structure of sol-gel films;

D O I：

10.1007/BF02436854

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

A series of SiO2-TiO2 sol-gel films with and without heat treatment were analyzed by EXAFS and XANES spectroscopies. Both techniques indicate that essentially all Ti4+ ions remain four-fold coordinated, with a Ti-O bond distance between 1.82-1.85 Angstrom. In the glassy films produced by heat treatment at 900 degrees C, a gradual phase separation may occur at the nanoscale, as the TiO2 concentration of the films increases.

引用

页码：293 / 297

页数：5

共 50 条

[41] Preparation of photocurable silica-titania hybrid coatings by an anhydrous sol-gel process
Altintas, Z.
Cakmakci, E.
Kahraman, M. V.
Apohan, N. K.
Gungor, A.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY, 2011, 58 (03) : 612 - 618
[42] New epoxy/silica-titania hybrid materials prepared by the sol-gel process
Lu, Shaorong
Zhang, Hailiang
Zhao, Caixian
Wang, Xiayu
JOURNAL OF APPLIED POLYMER SCIENCE, 2006, 101 (02) : 1075 - 1081
[43] Low cost sol gel derived silica-titania waveguide films - Characterization
Zieba, Magdalena
Tyszkiewicz, Cuma
Wojtasik, Katarzyna
Pavlov, Krystian
Chaber, Pawel
Gondek, Ewa
Niziol, Jacek
Rogozinski, Roman
Kielan, Pawel
Karasinski, Pawel
OPTICS AND LASER TECHNOLOGY, 2024, 171
[44] Effects of titanium content on properties of sol-gel silica-titania films via organically modified silane precursors
Que, WX
Sun, Z
Lam, YL
Chan, YC
Kam, CH
JOURNAL OF PHYSICS D-APPLIED PHYSICS, 2001, 34 (04) : 471 - 476
[45] Alternative modification methods for sol-gel coatings of silica, titania and silica-titania using ultraviolet irradiation and water vapor
Imai, H
Hirashima, H
Awazu, K
THIN SOLID FILMS, 1999, 351 (1-2) : 91 - 94
[46] Sol-Gel Derived Silica-Titania Waveguide Films for Applications in Evanescent Wave Sensors-Comprehensive Study
Karasinski, Pawel
Zieba, Magdalena
Gondek, Ewa
Niziol, Jacek
Gorantla, Sandeep
Rola, Krzysztof
Bachmatiuk, Alicja
Tyszkiewicz, Cuma
MATERIALS, 2022, 15 (21)
[47] Alternative modification methods for sol-gel coatings of silica, titania and silica-titania using ultraviolet irradiation and water vapor
Imai, H
Hirashima, H
Awazu, K
2ND INTERNATIONAL CONFERENCE ON COATINGS ON GLASS, ICCG: HIGH-PERFORMANCE COATINGS FOR TRANSPARENT SYSTEMS IN LARGE-AREA AND/OR HIGH-VOLUME APPLICATIONS, 1999, : 160 - 163
[48] Synthesis and characterization of silica-titania nanocomposite via a combination of sol-gel and mechanochemical process
Ting, P. K.
Hussain, Z.
Cheong, K. Y.
JOURNAL OF ALLOYS AND COMPOUNDS, 2008, 466 (1-2) : 304 - 307
[49] Sol-gel based phenolphthalein encapsulated heterogeneous silica-titania optochemical pH nanosensor
Islam, Shumaila
Bidin, Noriah
Riaz, Saira
Naseem, Shahzad
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY, 2016, 34 : 258 - 268
[50] Synthesis and Characterization of New Silica-Titania Mixed Oxides Obtained by Sol-Gel Technique
Elia, A.
Martin Aispuro, P.
Quaranta, N.
Martin-Martinez, J. M.
Vazquez, P.
EUROFILLERS, 2011, 301 : 136 - 145

← 1 2 3 4 5 →